HP E4219A ATM Network Impairment Emulator

The HP E4219A ATM Network Impairment Emulator module provides the capability to insert five impairment types -- cell loss, cell error, cell misinsertion, and cell delay into an ATM cell stream at rates up to 155 Mb/s. You can emulate noisy transmission lines, bufferring delays, satellite hops, traffic policing, switch malfunctions, etc.

At a click of a mouse, you can set up any possible network impairment. Set cell delay and loss values to emulate a real-world network. Connect the impaired cell stream output to your system under test, and see what happens.

Use the HP E4219A to find performance tolerances of your ATM network and CPE products, or determine service requirements when planning network capacity.

For example, MPEG is very specific about the amount of jitter it allows. The ATM transport stream can introduce milliseconds of jitter. Combine the HP E6271 MPEGscope ATM for the BSTS and the HP E4219A to introduce the jitter and verify that equipment can remove jitter effectively. The HP E4219A can also be used to verify that the system's error handling and detection capabilities are operational.

Network impairment modules can be cascaded to increase total cell delay and cell delay variation. For higher layer and automated conformance testing, combine the E4219A with E4209 Cell Protocol Processor.

The HP E4219 is a powerful tool for network equipment manufacturers, service providers, MPEG equipment manufacturers, R&D labs and CPE vendors, it runs on the industry-standard HP Broadband Series Test System.

For a copy of The ATM Impairment Testing Handbook, email your Company Name, Address, Phone Number to Evelyn_Blanchette@hp.com

• Emulates real-world impairments at the click of a mouse
• Several statistical impairment distributions including user-defined
• Wide delay range up to 220 ms of cell delay(+/-3%) & 2.57 ms (+/-3%)of cell delay variation
• C-language user programs for automated testing
• Selectively impair cells based on user-defined cell header field
• Cascadable up to four modules to increase total delay to provide impairments for additional VPI/VCIs

Channel Parameters

Total bandwidth
Up to 149.76 Mb/s

Modes
UNI or NNI

Empty Cell Definition
Idle or unassigned

ATM Header
Matching or Misinsertion Values

VCI
Any value 0 to 65536

VPI
Any value 0 to 255 (UNI) or 0 to 4095 (NNI)

GFC
Any value 0 to 15 (UNI)

Payload type
Any value 0 to 7

Cell loss priority
Set priority to 1 or 0

Cell type
ATM


Variable Cell Delay

Binomial
User-specified mean & standard deviation

Geometric
User-specified mean 
User Defined			
User-specified X, Y pairs represent desired probability density 
function


Variable Cell Delay Range

CDV
0 to 926 cells

Constant cell delay
0 to 79,136 cells


Cell Error

Normal
User-specified mean error interval from 5 to 2E10 cells or 1000 to 
1E12 bytes with user-specified standard deviation

Exponential
User-specified mean error interval from 5 to 2E10 cells or 1000 to 
1E12 bytes

Deterministic
User-specified cell error rate from 5E-11 to 2E-1; byte error rate 
from 1E-12 to 1E-3

Uniform
User-specified lower error intreval limit of 5 cells or 1000 bytes; 
user-specified upper error interval limit of 2E10 cells or 1E12 bytes

User Defined
User-specified X,Y pairs representing error intervals from 5 to 
2^32-1 cells or 1000 to 2^32-1 bytes with associated probability 
from 0.0 to 1.0 


Cell Loss

Normal
User-specified mean error interval from 1000 to 1E12 cells with user-
specified standard deviation

Exponential
User-specified mean error interval from 1000 to 1E12 cells

Deterministic
User-specified cell errror rate from 1E-12 to 1E-3

Uniform
User-specified lower error interval limit of 1000 cells; user-
specified upper error interval limit of 1E12 cells

User Defined
User-specified X,Y pairs from 1000 to 2^32-1 cells representing error 
intervals with associated probability from 0.0 to 1.0


Cell Misinsertion

Normal
User-specified mean error interval from 1000 to 1E12 cells with user-
specified standard deviation

Exponential
User-specified mean error interval from 1000 to 1E12 cells

Deterministic
User-specified cell errror rate from 1E-12 to 1E-3

Uniform
User-specified lower error interval limit of 1000 cells; user-
specified upper error interval limit of 1E12 cells

User Defined
User-specified X,Y pairs from 1000 to 2^32-1 cells representing error 
intervals with associated probability from 0.0 to 1.0


External Triggers
 

Variable Cell Delay
The delay value changes state

Cell Misinsertion
A cell has been misinserted by the module

Cell Error
A byte has been errored by the module

Cell Loss
A cell has been lost by the module

Constant Cell Delay
A cell has been delayed by the module

Incoming Non-Empty Cell
The module detects an incoming non-empty cell

Outgoing Non-Empty Cell
The module detects an outgoing non-empty cell

HP E4219A     ATM Network Impairment Emulator


Base system requirement:
HP E4200A/B      HP Broadband Series Test System Form 7 Transportable Base
HP E4210A/B      HP Broadband Series Test System Form 13 Mainframe Base

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Related product families available online:

Broadband Series Test System
Broadband/ATM

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